Segmental or sectional column.



` NITED STATES GEORGE DOANE, OF ELMIRA, NEW YORK.

'SEGMENTAL OR SECTIONAL COLUMN.

'srEcIFIcATIoN forming peri; of Lettere Patent No. 664,239, eieteei Deeemieer 1s, 190e.

Application filed September 19, 1900. Serial No. 30,501. (No model To a/ZZ whom it may concern:

Be it known that I, GEORGE DOANE, a citie zen of the United States, residing at Elmira,

in the county of Ohemung and State of New York, have invented certain new and useful Improvements in Segmental or Sectional Col-- umns; and I do declare the'following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accomh panying drawings, and to the characters of reference marked thereon, which form a part of this specification.

My invention relates to improvements in the construction of segmental or sectional columns; and the object is to provide the sections or segments composing a column with improved meansV for effecting a solid, effective, and permanent union of the contiguous sections, parts, or segments.`

With this object or purpose in view the invention consists in the novel construction of the joints whereby the sections or segments are united; and it particularly or especially consists in forming or providing one edge of the segment with projecting tongues and intermediate groove and the other and opposite edge with a projecting tongue and grooves at the sides of said tongue, the said tongue and grooves being formed tangentially to the meeting face edges of the segments or sections, so that they are firmly, effectively, and permanentlylocked together when assembled.

It will be observed that the invention is equally applicable to the union of segments of cylindrical or polygonal columns and is adapted to newels, posts, or to columns of large or small diameters.

I have fully and clearly illustrated my invention in the accompanying drawings, to be taken as a part of this specification, and wherein- Figure lis across-section of a portion of a column, illustrating the parts united by my improved means, showing the portion in polygonal superficies. Fig. 2 represents a crosssection of a portion of a column, showing the parts united, the parts being formed so as to produce a round column. Fig. 3 is a detail cross-section of a single segment or section made on a larger scale than the parts shown in Fig. 1'.

Referring to the drawings, A designates a cylindrical column, which may be of any diameter desired and of course of such length as maybe required. The column, it will be perceived, is composed of a plurality of sections or segments radially united or contiguous in general disposition of 'their meeting face edges, as at 1 2, and formed on one edge with tangentially-disposed grooves 3 4, be tween which projects a tongue 5, similarly and coincidently disposed, the tongue being longer than depth of the grooves which it divides, and the whole being 'adapted' to engage counterpart tongues and grooves in and on the contiguous and meeting edge of the joining section. On the other and opposite edge of the section or segment are formed projecting duplicate, tongues 6 7, between which is formed an intermediate groove 8, extending into the segment below or beyond the radial lines of the segment into the body thereof, substantially as shown. It will be perceived that the elements of union, being the tongues and grooves, are arranged at right angles to the radial lines of the segments, and consequently tangentially to the circle of the column. The union thus effected provides a strong, perfect, and durable lock between the component elements of the column, and the result is that a rigid, strong, and durable column is provided.

The assemblage of the parts of the column is readily effected by simply forcing the respective elements together until the last one of the series, which may then be sprung into place and then the whole keyed up into proper position. Of course the respective segments may be strongly held together by cementation; but it is readily perceived that lthe improved locking means will hold the segments in close unity without additional extraneous means.V

What I claim, and desire to secure by Letters Patent, is-

l. A column composed of a plurality of longitudinal sections formed with contiguous face edges having tongues and grooves at right angles to the radial lines and tangential to the circle of the column, the central or Ioo surfaces counterpart grooves and a projectL ing intermediate tongue projecting beyond the grooves and radial abutting surfaces,sub stantially as and for the purpose specified.

In testimony whereof I aix my signature in presence ot' two witnesses.

GEORGE DOANE.

lVitnesses:

GEORGE W. WARD, W. N. CHAPMAN. 

